I'm intetested in knowing where the idea of the 5 trees in Svarga or Devaloka (Pancavriksha, Kalpavriksha) is described in the Hindu scriptues. I'm especially interested in the earliest occurences mentioning 5 trees. Thank you for your help in advance.
The Devi Bhagavatam, in the verses given below, mentions the names of the five celestial trees namely -- Mandara, Parijata, Santana, Kalpa and Harichandana.
41-44. Indra said :-- “O Devî! True that I have no other powerful enemy, yet I do not find peace nor any happiness. I fear for the sin Brâhmahattyâ in my house. O Devî! This Nandana Garden, the city of Kuvera, the lord of riches, this nectar forest, the sweet music of the Gandbarbas, the beautiful dance of the Apsarâs, all these now do not give the least pleasure to me. What more can I say than this that the beautiful Lady like you, most beautiful amidst the three worlds, and other beautiful ladies, the Heavenly cow, the Mandâra tree (one of the five trees of the celestial region), the Pârijâta tree (the flower tree), the Santâna tree, the Kalpa tree (yielding all desires) and the Harichandan (saffron tree) and others cannot give pleasure to me. What to do, where to go, so that I get happiness, O Beloved! This thought makes me uneasy. And so I am not able to get happiness in my own thought.”